The number of serious injuries and deaths occurring to pedestrians who were walking with headphones has tripled in seven years in the United States, according to a report published in Injury Prevention.

Dr. Richard Lichenstein and co-authors from the University of Maryland School of Medicine reported 116 crashes involving pedestrians who were wearing headphones between 2004 and 2011. Eighty-one of them resulted in deaths. It started with 16 cases between 2004 and 2005 and rose to 47 by 2010 and 2011. FULL POST

Physical exercise is critical to keeping our brains healthy, preventing or slowing the progression of cognitive decline that can lead to dementia, according to the Centers for Disease Control and Prevention. Unfortunately the CDC estimates that only 14% of adults aged 65 to 74, and 4% of adults over 75, exercise regularly.

These were the facts Dr. Cay Anderson-Hanley had when she began a study on exergaming and older adults. The assistant professor at Union College in New York hoped to determine if exergames - virtual reality games that combine exercise with interactive features - would motivate senior citizens to work out more.

Get a behind-the-scenes look at the latest stories from CNN Chief Medical Correspondent, Dr. Sanjay Gupta, Senior Medical Correspondent Elizabeth Cohen and the CNN Medical Unit producers. They'll share news and views on health and medical trends - info that will help you take better care of yourself and the people you love.